Answer:
Use the Pythagorean Theorem in reverse by using Subtraction:
Step-by-step explanation:

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56/2 = 28, so you can fit number 2 exactly 28 times in 56.
Answer:
let w = the width of the rectangle
let w- 9=the length of the rectangle
A= L×W
220=w(w-9)
220=w^-9w
w^-9w-220=0
(w-20)(w+11)=0
w-20=0 or w+11=0
w=20cm or x-11 illogical answer